Heavy duty fiber drum for liquids and semiliquids



Dec. 7, 1954 H. A. BERGSTROM K HEAVY DUTY FIBER DRUM FOR LQUIDS ANDSEMILIQUIDS Filed Jan. 2, 1951 7 rE" Z' INVENTOR BY hm, 6%, www ATTQRNEWHEAVY lDUTY FIBER DRUM Fon LIQUIDS AND sEMrLrQUms l Application January2, 1951, Serial No. 204,007 1 Claim. (Cl. 229-55) The invention relatesto new and useful improvements in a heavy duty fiber container of largecapacity and especially adapted for the storing and shipping of liquidand semi-liquid products.

An object of the invention is to provide a heavy duty fiber containerwherein a metal chime surrounding the lower end portion of the body ofthe container and the flange of a metal tray embodied in the bottom endstructure of the container are rolled together and interlocked in abottom and bead abutting the bottom end of the container.

A further object of the invention is to provide a container of the abovetype wherein the liner for the body and the liner for the inner face ofthe bottom end are extended into the bead where they are pressed into aliquid tight seal without the use of glue or heat sealing so that uponsevere handling and distortion of the bottom chime the liquid tight sealis unaffected.

In the drawings:

Figure 1 is a View in vertical section with all the parts of the sidewall structure and bottom end structure in assembled position beforerolling the chime, body Wall and metal tray flanges into a bottom endbead;

Figure 2 is a view similar to Figure 1, but showing the body wall beadedto form a support for the bottom end structure and the chime, body wall,the metal tray flange, and the flanges of the inner and outer liners forthe bottom end, all rolled into a bottom end bead.

The invention has to do with a fiber drum of large capacity and isparticularly designed for storing and shipping of liquid and semi-liquidproducts. The body wall 1 of the container is built up to a suitablethickness of fiber board in order to give strength to the body wall forthe purposes stated. This body wall is initially formed in cylindricalshape from end to end thereof. The inner face of the body 1 has a liner2, said liner may be made of any suitable material. The liner is coatedwith a liquid resisting material such as polyethylene, Vinylite, Saran,Pliofilm, or any other type coating that will resist the materials whichare to be packaged and which are also strong and flexible enough towithstand the final forming of the body, as well as shipping abuses.

The heading structure for closing the lower end of the body is preformedand then inserted in the body a sufllcient distance so as to provide arolled bottom end bead for joining the bottom to the body. The bottomend structure includes a filler disk 3 built up of layers of ber boardglued together and may be formed of a thickness which will give thedesired strength to the body end structure. On the inner face of thisfiller disk 3 is a liner 4 which may be of flberboard, kraft paper, or astretchable crepe paper coated on its inner face with polyethylene orsome similar material which is liquid resisting. This liner 4 is in theform of a tray with a flange which extends across the end of the fillerdisk and outwardly therefrom to the end of the body Wall where it isturned laterally over the end of the body wall as indicated at 5 inFigure l of the drawings.

A tray 6, predrawn from metal into pan form is next applied to the outerface of the filler disk. Prior to the inserting of the tray in theassembly, it may be coated with a relatively permanent tacky adhesive soas to hold it as a unit with the remainder of the end structure. Thismetal tray 6 has a flange 7 which is of sufficient length so that itextends along the container body to the end thereof where the outwardlyturned end 8 overlies the end of the Mice body wall when the endstructure i-s assembled in 1the cylindrical body.

ln the present illustrated embodiment of the invention, a protectingcover 9 is provided for the outer face of the metal tray 6 and theflange 7 thereof. This .covering for v the metal tray is preferablyformed of a plurality of plies of kraft board laminated together withasphalt and the outer ply of a melamine wet strength paper to give wetscuf resistance. This protecting covering 9 when ernployed is alsoprovided with a flange 10 which extends to the end of the body wall andis turned the same as indicated at 11 in Figure 1 when the end structureis assembled in the cylindrical body. The principal purpose of thiscover 9 is to protect the metal tray from water that might be present onwet floors as well as moisture, or to resist corrosive fumes that wouldpass through a plain sheet of kraftboard. When the container is usedwhere these conditions do not exist, then this protective covering maybe omitted.

A metal band or chime 12 is next applied to the outer face of the bodywall. This band is shaped so that it extends inwardly at 13 around theend of the body wall and the tray flanges and laps onto the inner faceof the inner tray flange as indicated at 14.

After this chime has been applied then the body wall is submitted to aforming mechanism which forms an inwardly extending rib or groove 15 inthe band 12, the body wall 1 and the lining 2 thereon. This invertedgroove is so disposed in the body wall that it forms a substantiallyhorizontal extended ledge or shoulder 16 against which the bottom endstructure is clamped and supported. After the body wall has been formedinwardly to form this support for the bottom and the end portion of thebody wall, the chime and the tray flanges are rolled inwardly to form abottom end bead 17. This bead is formed under terrific pressure whichcauses the bead to firmly Contact with the bottom heading and clamp thesame tightly against said shoulder or ledge 16. The end portion 14 ofthe chime will extend all the way around the bead and forms in effect ahook within which is housed the body wall and the end portions of theflanges of the tray members constituting the heading structure. Theflanges 7 of the metal tray imbedded in the end structure extends aroundinto this hook of the chime and forms in itself a hook within which theend of the chime extends. In other words, the chime and a flange of themetal tray are interlocked by these hook ends.

The terrific pressure which is employed in the forming of this bead fromthe chime, body wall and tray flanges will cause the fiber board of thebody, the liner 4 and the covering tray 9 to fill all the spaces withinthe bead and thus make a very tight liquid-proof seal. This interlockingof the hook ends and the packing of fiber in between said hook ends andthroughout the bottom end bead, thus forming a solid bead, produces ajoint which is very strong, and one that is not likely to be damaged soas to affect its serviceability during handling, or when dropped on itschime from ,a loading platform or the floor of a truck.

The terrific pressure which is/employed in the forming of this bead fromthe chime, body wall and tray flanges, will force the liner 2 of thebody wall and the liner 4 of the end structure into intimate contact andthus produce a liquid-tight seal without the use of glue or any heatsealing of these parts.

It is obvious that many changes may be made in the details ofconstruction and the arrangement of parts without departing from thespirit of the invention as set forth in the appended claim.

I claim:

A heavy duty fiber container comprising a body of fiber board having aninner protecting liquid proof liner extending all the way to the bottomend of the body wall, a bottom heading consisting of a filler disc oflaminated fiber board, an inner liquid proof protecting liner having aflange extending outwardly along the body wall and its liner to the endof the body wall when assembled, an outer metal tray having a flangeextending outwardly along the body wall to the end thereof whenassembled and an outer protective disc of kraft board laminated togetherwith asphalt, said outer protective disc having a flange extendingoutwardly along the body wall to the end thereof, and a metal chimesurrounding the lower end portion of the body, said chime and body wallbeing formed inwardly to provide an abutment shoulder against which thebottom heading is clamped, said chime, body wall, body liner and theanges of the bottom heading 5 being curled inwardly and forced againstthe outer face of the bottom heading and forming a solid liquid tightbead in which the body wall liner and the inner protecting liner of thebottom heading are brought into intimate Contact and in which the hookend of the metal tray flange extends into and is interlocked with thehook end formed on the end of the chime.

References Cited in the le of this patent Number UNITED STATES PATENTSName Date Grith Dec. 20, 1932 Harrisson Nov. 4, 1941 Eggress Jan. 12,1943 Scott Nov. 9, 1943 Di Cosmo Mar. 23, 1948

